2 files changed, 6 insertions, 3 deletions
diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index e43e897783..25d099d83e 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -1327,7 +1327,7 @@ module ActionDispatch
             msg += @draw_paths.map { |_path| " * #{_path}" }.join("\n")
             raise ArgumentError, msg
           end
-          
+
           route_path = "#{path}/#{name}.rb"
           instance_eval(File.read(route_path), route_path.to_s)
         end
diff --git a/actionpack/lib/action_dispatch/testing/integration.rb b/actionpack/lib/action_dispatch/testing/integration.rb
index 3fdc6688c2..50ca28395b 100644
--- a/actionpack/lib/action_dispatch/testing/integration.rb
+++ b/actionpack/lib/action_dispatch/testing/integration.rb
@@ -193,8 +193,11 @@ module ActionDispatch
 
         # If the app is a Rails app, make url_helpers available on the session
         # This makes app.url_for and app.foo_path available in the console
-        if app.respond_to?(:routes) && app.routes.respond_to?(:url_helpers)
-          singleton_class.class_eval { include app.routes.url_helpers }
+        if app.respond_to?(:routes)
+          singleton_class.class_eval do
+            include app.routes.url_helpers if app.routes.respond_to?(:url_helpers)
+            include app.routes.mounted_helpers if app.routes.respond_to?(:mounted_helpers)
+          end
         end
 
         reset!